Creative Commons License

MYOSA (Make Your Own Sensors Applications) is a plug-and-play, multipurpose, multi-sensor system for learning purpose. The motherboard of MYOSA is an Arduino derived opensource motherboard. It is like a lego set with which students can play and learn about the sensors. More importantly, it provides the users ready-to-apply connections of sensor-boards and the motherboard so that the user doesn’t have to worry about wires and can directly jump on various creative applications. Various blocks include different sensors and an OLED display that shows the output. The motherboard also has a Bluetooth module through which the output data gets transferred to the MYOSA mobile app.

Specifications of MYOSA V2.0 Mega Motherboard

MYOSA Board Pin-out

  • Microcontroller – ATmega2560
  • Operating Voltage – 5V
  • Input Voltage (Recommended) – 7-12V
  • Input Voltage (limit) – 6-20V
  • Digital I/O Pins – 54 (of which 15 provide PWM output)
  • Analog Input Pins – 16
  • DC current per I/O Pin – 20mA
  • DC current for 3.3V Pin – 50mA
  • Flash Memory – 256 KB (of which 8 KB used by bootloader)
  • SRAM – 8KB
  • EEPROM – 4KB
  • Clock Speed – 16MHz
  • LED_BUILTIN – 13
  • Length – 95mm
  • Width – 50m


  • Onboard: Bluetooth v2.0 (HC-05)
  • Daughterboard: WiFi (ESP8266-12E, 1MB Flash)

The Sensors

With MYOSA’s lego-like sensorboards you can play, learn and experiment at the same time. They’re pre-programmed so that you don’t have to go through the hassle of installing them and making the circuitry.

Luminosity Sensor Datasheet: TSL2561
Output: Intensity in Lux
Temperature and Humidity sensor  Datasheet: SI7021
Output: Temperature in Celsius (°C) and Relative Humidity in (%)
Pressure Sensor Datasheet: BMP180
Output: mbar and mmHg
Accelerometer and Gyroscope Datasheet: MPU6050
Output: Acceleration: x, y and z-direction in terms of g and rotation in degrees(°)
Magnetometer Datasheet: HMC5883L
Output: milligauss (mG)
Air Quality Sensor Datasheet: CCS811
Output: CO2 in Parts per Million (PPM) and Total Volatile Organic Compound (TVOC) in Parts per Billion (PPB)
Particle Sensor Datasheet: MAX30105
Output: Current heart rate and average heart rate in beats per minute (bpm)
RGB and Gesture Sensor Datasheet: APDS9960
Output:  Gesture in  Up, Down, Left, Right, Far and Near; RGB value in the range of 0 to 1023

The Actuators

For greater extendibility and use of MYOSA, actuators like LED and micromotor have been provided in the form of modules. These modules can simply be plugged in the motherboard and the outputs in the form of lighting up of LEDs and the rotation of motors can be triggered.

The Mobile App

For easy and handy access to the sensors’ readings and data, the MYOSA Android app has been developed. The data observed on the OLED display is uploaded to the app via Bluetooth module and updated continuously. Changing trends of the sensor readings can be studied using the graphs available on the app. Readings of the sensors, which are connected to the MYOSA board will be automatically displayed on the app.

Creative Commons License
MYOSA by Dr. Anil K Roy and Abhishek Jani is licensed under aCreative Commons Attribution-ShareAlike 4